1. Engineer Training Bridge System TJ8300 / TJ8500 Bridge System

2. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 2 Bridge Movement: General Description Bridge right axis (1 bar) Bridge weight (×4) Bridge left axis (2 bars) Bridge chassis

3. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 3 Bridge Stepper Motors (Z-Axis Movement)  Bridge stepper motors are placed on each side of the bridge.  They enable the bridge to move towards and away from the drum. Left stepper motor & axis Right stepper motor & axis

4. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 4 Bridge Movement Backwards/Forwards (Z-Axis) The bridge consists of 4 main parts:  Bridge right stepper motor & axis – provides the bridge motion abilities on the right side.  Bridge left stepper motor & axis – provides the bridge motion abilities on the left side.  Bridge weight – provides the bridge stabilization and friction.  Bridge chassis – provides support to the bridge.

5. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 5 Bridge Right Stepper Motor & Axis (Z-Axis) Stepper motor Rolling shafts Belt cover Shaft holders Motion limiter Pulley Motor belt

6. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 6 Bridge Right Stepper Motor & Axis (Z-Axis) – Cont.  There are are two rolling shafts, which provide the bridge stability and right side motion abilities.  Motor Belt – transfers the bridge motor rotation to one of the two rolling shafts.  Shaft holders – holds the bridge axis shaft while enabling it to roll.

7. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 7 Bridge Right Stepper Motor & Axis (Z-Axis) – Cont.  Motion limiter – limits the bridge motion and protects the rolling shafts.  Rolling shafts – provides the bridge motion abilities (rotated by the bridge motor).  Stepper motor – controlled by the STC board. Rotates the rolling shaft to move the bridge backwards and forwards.  Belt cover – covers the motor belt to keep it from jamming or hurting someone.

8. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 8 Bridge Left Stepper Motor & Axis (Z-Axis) Motor belt Shaft holders PulleyRolling shaft Belt cover Stepper motor Pulley

9. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 9 Bridge Movement – Left Axis (Z-Axis Movement) The left axis consists of only one rolling shaft, which provides the bridge with its left side motion abilities.

10. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 10 Bridge Z-Axis Movement Bridge right axis on top of right chassis axis. Bridge left axis on top of left chassis axis.

11. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 11 Bridge Z-Axis Movement (Cont.)  Bridge movement towards the plot position and back to the maintenance position is enabled by two built-in stepper motors inside the bridge.  Bridge movement is a floating system that is based on friction between the crossed bars.  Rotating the motor clockwise takes the bridge towards the drum, whereas counter-clockwise movement takes the bridge to the maintenance position.  A stop on the main roller allows the bridge to stay in the Print position.

12. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 12 Bridge Distance Proximity Sensors  The four sensors provide an indication of the bridge in forward position during printing, and backwards when in maintenance position.  The two front bridge sensors are proximity switches and the two back ones are limit switches. 1 2 2 1

13. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 13 Bridge Systems Printing heads Ink manifolds Waste drain system Sloped waste bath Printing heads drivers enclosure

14. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 14 Bridge Systems (Cont.) The bridge consists of 5 main sub-systems: 1.Printing heads drivers enclosure – the space in the bridge chassis where the printing head drivers are installed. 2.Print heads (x150) – color jetting devices that are controlled by electronic signals. 3.Ink manifolds – supply ink from the color system to the printing heads. 4.Waste drain system – drains the ink waste down to the sloped waste bath. 5.Sloped waste bath – drains the waste down to the waste tub.

15. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 15 Print Heads

16. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 16 Print Heads (Cont.) 1.The bridge contains 150 print heads. 2.The printing heads are arranged in 6 lines of 25 heads for each color. 3.The color order from top to bottom is CL, ML, Y, C, M, K. 4.The heads are connected to the bridge by screws. 5.Ink is supplied to the heads by applying pressure or natural gravity. 6.Ink is sprayed out from the heads when electronic signals are received from the print head drivers.

17. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 17 Bridge Waste Manifold Bridge waste manifold Sloped bath drain tube Sloped bath

18. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 18 Bridge Waste Manifold (Cont.) 1.During print heads operation and LPAP function, waste ink drips down to the drain holes under the print heads. 2.Each group of five drain holes is connected to one manifold, via plastic tubes. 3.From the manifold, the waste ink flows down to a sloped bath, and from there down to the main waste bin, which is located under the machine. 4.The main waste bin is drained by the waste pump to the external 25L Waste bottle.

19. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 19 Bridge Distance Cylinders The bridge distance cylinders provide bridge-to-drum parallel distance control during the printing process. Manual DST (from machine 33) Pneumatic DST (up to machine 32)

20. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 20 Bridge Motor and Encoder Enables the bridge to print at constant speed on the printing axis. Print Motor (Y-axis)

21. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 21 Bridge Motor and Encoder (Cont.)  The Linear encoder detects the precise movement of the bridge along the printing axis and sends back the pulse count to the GALIL DMC controller.  The Linear encoder has a built-in index for bridge home position.

22. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 22 Bridge Y-Axis Movement (Left-Right Print Axis) Right chassis roll Left chassis roll

23. Engineer Training Bridge System TJ8300 / TJ8500 Confidential 23 Bridge Y-Axis Movement (Left-Right Print Axis) – Cont.  The bridge is situated on two chassis rolls: the left, and the right.  The right roll is connected to the chassis print motor (Y-Axis motor) via pulley and timing belt.  By rotating the right chassis roll to CW direction, the bridge moves from right to left.  By rotating the right chassis roll to CCW direction, the bridge moves from left to right.  The Linear encoder counts the pulses/mm during the bridge moment along the print axis and sends feedback to the GALIL DMC board.  Print motor is controlled by the GALIL DMC board via MCDU.